The flexible Ag/TiO2/ITO/PET resistive switching memory is prepared by low-temperature sol-gel method with UV irradiation, and the simple method that combined the advantages of sol-gel method and low ...temperature can be applied to fabricate high-quality film. The flexible Ag/TiO2/ITO/PET memory device displays good resistive behavior, for instance, the narrow distributions of switching voltages, good cycle endurance, and long retention time. Meanwhile, the multilevel resistance states of the device can be realized by controlling the compliance current or reset voltages, showing the potential of applications in neural networks and high-density storge. In addition, flexibility of the Ag/TiO2/ITO/PET is studied, which exhibit good endurance and retention properties under bending condition. The I–V curves are replotted and fitted for analyzing the conductive mechanism of the device. The fitting results show that SCLC and Ohmic mechanism are main mechanisms of high resistance state and low resistance state respectively. The electrochemical and thermochemical modes are adopted to explain resistive switching behavior. Our results indicate the Ag/TiO2/ITO/PET memory has potential application in wearable and foldable electronics.
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•The flexible Ag/TiO2/ITO/PET resistive switching (RS) devices were prepared by low-temperature sol-gel method with UV irradiation.•The multilevel resistance states of the RS memory show the potential of applications in neural networks and high-density storge.•The flexibility of the Ag/TiO2/ITO/PET device indicate the device has potential application in wearable and foldable electronics.
Zein was used as the substrate to provide in situ growth sites the nano-cerium oxide (CeO2), a hydrophilic polymer polyvinyl pyrrolidone (PVP) served as stabilizer for nano-ceria, novel zein/PVP/CeO2 ...ternary composite films have been successfully designed by the in situ low-temperature (ISLT) sol-gel growth. Different from the simple conventional low-temperature (CLT) sol-gel method, nano-cerium oxide shows controllable shape, narrow size distribution and good dispersivity. In addition, the CeO2-embedded hybrid films exhibit superior ultraviolet (UV) blocking properties, high transparency and hygroscopic capacity, which broaden the practical application range of nano-cerium oxide.
We reported novel zein/PVP/CeO2 ternary composite films using the in-situ low-temperature sol-gel growth. Display omitted
•A novel zein/PVP/CeO2 film was successfully designed by in-situ low-temperature sol-gel growth.•Nano-cerium oxides are affected by space limitation in the inter-network space.•CeO2 shows controllable shape, narrow size distribution and good dispersivity.•The films exhibit superb UV-blocking, high transparency and hygroscopic capacity.
► The CoTiO3 films have been obtained for the first time without heat treatment under usual conditions. ► Study of interface CoO–TiO2 NPs reaction for composite formation. ► Create a new ...low-temperature sol–gel synthesis of nanosized ilmenite(Co) crystals, without heat treatment. ► The effect of stoichiometric ratios of components on CoTiO3 crystallization is studied. ► Possible chemical transformations are represented by schemes.
The present work reports a new approach for a low-temperature synthesis of CoTiO3 based on titanium isopropylate hydrolysis in the presence of cobalt pyrochroite dispersed nanoparticles. This allowed to carry out the synthesis of the material at near-room temperatures without heat treatment stage. It is found that ilmenite phase formation occurs upon partial dehydration of the Co(OH2)62+ complex to yield a mono- or a di-aqua complex (Co(OH2)(OH)2; Co(OH2)2(OH)2). An analysis of composition of formed materials depending on stoichiometric ratios of components is performed using X-ray diffraction and thermal analyses. Using thermal analysis data, an investigation on the effect of formed prestructure and composition of materials on ilmenite crystallization temperature is carried out. Possible ways of chemical interaction are presented. Using atomic force microscopy, the morphology of products formed in the course of synthesis and fixed on the surface of heat-unstable materials is studied.
Nanoscaled Fe(III)-doped TiO2 crystalline particles, which exhibited high photocatalytic activity and excellent photoelectrochemical properties under visible light irradiation, were successfully ...synthesized by low-temperature sol–gel formation of titania sol in the presence of magnetite phase without annealing for the first time. We have shown an anatase crystal doping in water solutions with record incorporation into the lattice of iron ions (13at%).
► Create a new Fe2TiO5 crystalline coatings without calcination. ► Study of interface Fe3O4–TiO2 NPs reaction for increasing spectral activity. ► Create a new low-temperature sol–gel synthesis of ...nanocomposite without annealing.
TiO2-based and Fe3O4-based nanocomposites are of interest as photocatalysts, materials for spintronics, sensors, etc. This paper presents a new approach to synthesize pseudobrookite crystallites which is based on sol–gel transformations and interaction of the multiphase colloidal system components and makes it possible to yield hydroxylated crystallites of a material that is identical to pseudobrookite according to XRD at near-room temperature without annealing stage. Using results of dynamic light scattering and low-temperature nitrogen adsorption–desorption the structural changes occurring upon the interaction of TiO2 and Fe3O4 nanoparticles in the synthesis process were studied. Comparison of the spectral characteristics of the nanocomposite consisting of titania (anatase) and magnetite in the visible and UV spectral regions showed a significant visible-region shift of the nanocomposite absorption bands compared to pure components.
A low-temperature solution-processed high-k gate dielectric layer for use in a high-performance solution-processed semiconducting polymer organic thin-film transistor (OTFT) was demonstrated. ...Photochemical activation of sol-gel-derived AlOx films under 150 °C permitted the formation of a dense film with low leakage and relatively high dielectric-permittivity characteristics, which are almost comparable to the results yielded by the conventionally used vacuum deposition and high temperature annealing method. Octadecylphosphonic acid (ODPA) self-assembled monolayer (SAM) treatment of the AlO
was employed in order to realize high-performance (>0.4 cm²/Vs saturation mobility) and low-operation-voltage (<5 V) diketopyrrolopyrrole (DPP)-based OTFTs on an ultra-thin polyimide film (3-μm thick). Thus, low-temperature photochemically-annealed solution-processed AlO
film with SAM layer is an attractive candidate as a dielectric-layer for use in high-performance organic TFTs operated at low voltages.
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